package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.HttpClients;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties wechatProperties;

    @Autowired
    private UserMapper userMapper;

    //微信服务接口地址
    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务 获取用户的openid
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空 为空 返回登录失败
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        // 判断当前用户是否为新用户
        User user=userMapper.getByOpenid(openid);
        // 是 新用户自动完成注册
        if(user==null){
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回用户信息
        return user;
    }


    //调用微信接口服务 获取用户的openid
    private String getOpenid(String code) {
        Map<String,String> map=new HashMap<>();
        map.put("appid",wechatProperties.getAppid());
        map.put("secret",wechatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonJOSN = JSON.parseObject(json);
        String openid = jsonJOSN.getString("openid");
        return openid;
    }
}
